You have to have oxygen to have an explosion and that means the right mix as well. Getting a large enough cloud of methane/air mix over a rig or a wellsite is one thing, but miles across between the LEL and UEL is pretty tough to do.
Whatever happens to blow things out of the hole may be a high pressure event, but not a typical explosion, just a pressure difference without the chemical reaction.
Yes, I do have plenty of respect for both, I'm a former firefighter as well as an oilfield hand.
Nothing out there is cheap enough to die for, or too expensive if everyone makes it home.
Some of the old guys sure had some stories to tell,,,
I thought I saved the piece about areas with the highest
bottom hole pressures but I guess Vista ate it !...;0)